Originally Posted by Bart
5. Airline employees, mostly crew members, are designated as selectees but use their airline identification to get through the checkpoint to purposely avoid the additional screening. Always end up getting screened at the gate anyway.
Employees of "U.S. aircraft operators," including flight crew, qualify for SSSS exemption, so the scenario you mentioned shouldn't happen in the real world. I'm pretty sure members of the U.S. military (active, reserve and National Guard) can also be exempted even when they're not on official travel, per last month's TSA directive on selectee exemption.